Taking Objects from One File to Another

How do I “copy” objects from one .blend file and put them in another? Someone once taught me how to do this via grouping, but I cannot figure out how to do it again…

Thanks!

Look here

http://blenderartists.org/forum/showthread.php?t=88793
http://blenderartists.org/forum/showthread.php?t=87992
http://en.wikibooks.org/wiki/Blender_3D:_Noob_to_Pro/Using_Blender_Libraries